A Google Twitter account for Nexus devices (@googlenexus) actually tweeted a screenshot of possibly an update to the Google Dialer app. The Google support tweep was trying to explain a user how to see details of a call log but took a screenshot of a pre-release app.

The tweeted screenshot of the pre-release Google Dialer app
The tweeted screenshot of the pre-release Google Dialer app

The current Google Dialer app is entirely white with minor shades but the picture tweeted showed a blue action bar.

This screenshot shows that Google might be doing a large a major overhaul to either the android design

Just in case you want to know how the current /old Google Dialer looks like, below is a picture

The Current Google Dialer App
The Current Google Dialer

 

Source: Android Police